Start practicing

Oral Surgery · single question

A tooth #8 has a fracture involving enamel and dentin but NO pulp exposure. Tooth #9 has a small chip involving only enamel. What are the Ellis classifications?

  1. #8: Class III; #9: Class II
  2. #8: Class I; #9: Class II
  3. #8: Class II; #9: Class I
  4. #8: Class III; #9: Class I
Show answer and explanation

Correct answer: C. #8: Class II; #9: Class I

  • A. Incorrect. Class III requires pulp involvement, which is absent in #8.
  • B. Incorrect. #8 involves dentin (not just enamel) = Class II, not Class I.
  • C. Correct. Ellis Classification: Class I = enamel only. Class II = enamel + dentin, NO pulp exposure. Class III = enamel + dentin + pulp exposure. Class IV = tooth becomes non-vital. #8 has enamel + dentin without pulp = Class II. #9 has enamel only = Class I.
  • D. Incorrect. Class III involves pulp exposure — #8 has NO pulp exposed.

Practice Oral Surgery questions Oral Surgery study notes

More Oral Surgery practice questions